I run "ipconfig" on the local Windows PC, which give me the current IP (delievered from dhcp). Isn't that correct value to use?
That's not the correct value for 2 reasons...
1) Because you're using a VPN to access the remote machine, it probably is separated from the rest of the 'net by a firewall. Try logging into the remote machine and pinging the local machine's IP address. Do you get a response?
2) Even if the remote machine could reach the local machine via the DHCP-assigned IP address, doing so would circumvent the VPN (the X traffic would go _around_ the VPN instead of _through_ it).
You really need to talk to someone who is knowlegable about your VPN setup to help you figure out the IP address that's associated with the far-end of the VPN tunnel.
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